Both have their own advantages and disadvantages.
The Heart Spirit Oath binds only the individual cultivator.
If the Jade Scroll is lost or if someone has already given up on the path of cultivation, they won't care about these constraints and can disseminate the information freely.
On the other hand, the Restriction Technique can initially use restrictive methods to block most people from exploring cultivation. If someone tries to break the restriction without understanding the Restriction Technique, it could even trigger the Power of Restriction, reducing the Jade Scroll to dust.
Thus, it's impossible to peek at the Immortal Technique inheritance within the Jade Scroll.
Of course, if a cultivator has mastered a brilliant forbidden-breaking technique, this limitation would be of little use.
Therefore, some who are particularly cautious will make adjustments to the content...
In the Cultivation Realm, techniques are not easily shared.
